Hi, i need to move some files on a hard disc in Knoppix, but when i do it tells me "Could not make folder /mnt/sda2/..."

Ive tried to change the properties for the disc , permissions and then Owner Can view & modify content,
but when i do that, i get another error "Changing the attributes of files is not supported with protocol devises."

Ive looked for solutions in the forums and faqs but found none, please help me with this.
Im pretty much a begginner with Knoppix so please make a easy explonation thanks.

Thanks in advance , Simon